Using thick icing, pipe along bottom and long edges of side pieces; attach to base piece and other side pieces, propping with cans as needed to support, to form bottom of lighthouse. Pipe along top edges of sides; attach overhanging roof piece.

Pipe along 1 long edge and 1 inside short edge of front window base piece; attach to overhanging roof piece on front side of lighthouse, supporting with spice bottle or container as needed.

Pipe along 1 long edge of 1 side window base piece; attach to front window base piece. Repeat with remaining window base back and side pieces, attaching short ends together to form standing square.

Pipe along top edges of window base; attach window base square.

Pipe along 1 long edge and 1 short edge of 1 window; attach to window base, propping as needed. Repeat with remaining windows, attaching short sides together to form standing square.

Pipe along bottom and side edges of roof pieces; stand on windows to form pyramid, starting with 2 opposing pieces to support.

Pipe along long edges of door sides; attach to front of lighthouse, pointed ends down and leaving room for door in between. Attach door. Pipe along top of door and door sides; attach door roof pieces. Let dry for 20 to 30 minutes.

Using icing and assorted candies, decorate lighthouse, tinting some of the icing red if desired. Decorate front yard and water as desired. Sprinkle with brown sugar for sand and blue sugar for water. Let dry until firm, about 3 hours.